/*
 * Copyright 2006 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package br.edu.ufcg.dsc.actions;

import java.util.List;
import java.util.Map;
import java.util.Vector;

import org.apache.struts2.util.StrutsTypeConverter;

/**
 * 
 */
public class StringListConverter extends StrutsTypeConverter {

	@SuppressWarnings("unchecked")
	public Object convertFromString(Map context, String[] values, Class toClass) {
		if (values != null && values.length > 0 && values[0] != null
				&& values[0].length() > 0) {
			List<String> result = new Vector<String>();

			for (String s : values[0].split("\\Q;\\E")) {
				if (!"".equals(s.trim()))
					result.add(s.trim());
			}

			return result;
		}
		return new Vector<String>();
	}

	@SuppressWarnings("unchecked")
	public String convertToString(Map context, Object o) {
		if (o instanceof List<?>) {
			List<String> list = (List<String>) o;

			if (list.size() == 0)
				return "";

			String result = list.get(0);
			for (int i = 1; i < list.size(); i++)
				result += "; " + list.get(i);

			return result;
		}
		return "";
	}
}
